Type-writing machine.



V. KOBLER STAUDER.

TYPE WRITING MACHINE, APPLICATION FILED MAY 23, l9l6.

Patented NOV. 6,1917.

4 snzaTs-suan 1.

V. KOBLER-STAUDER.

TYPE WRITING MACHINE.

APPLICATION FILED MAY 23, was.

L iww. PatentedNov. 6,1917.

4 SHEETS-SHEET 2- v. .KOBLER-STAUDER.

TYPE WRITING MACHINE.

, I APPLICATION FILED MAY 23, 1916- v 1 ,45326. Patented Nov. 6, 1917.

' 4 SHEETS-SHEET 3.

V. KOBLER-STAUDER TYPE WRITING MACHINE.

APPLICATION FILED MAY23, 191s.

Patented Nov. 6, 191?.

4 SHEETS-SHEET 4- uirnn STATES ratrnivir OFFICE.

VICTOR Kantian-erectile, OF zUnrcH, SWITZERLAND.

I TYPE-WRITING MACHINE.

-to the accompanying drawings, and to letters or figuresof referencemarked thereon, which form a part of this specification.

This invention relates to means for pre-' venting the operator of atypewriting machine from writing too close to the bottom edge of thework sheet,- by automatically locking the platen of thetypewriter'before the bottom edge of the work sheet has passed theprinting point. V

The accompanying drawings illustrate several embodiments of theinvention.

A first embodiment is shown in Figs. 1 to 7 in which 7 Figure 1 is aside elevation Fig.2isaplan, Fig. 3 is a section on line A. B of Fig. 2,Fig. 4 is a section on line CD of Fig. 2. Fig. 5 is a section on line EFof, Fig. 1, Figs.;6 and 7 show the mechanism in two different positions,

Figs. 8 and9 are schematical views of different positions of a sectionembodiment of the invention,

Figs. 10 and 11 show a third embodiment, Figs. 12 and 13 a fourth andFig. 14 a fifth embodiment of the invention.

A last embodiment is illustrated by the Figs. 15 to 20, of which Fig. 15is a side' elevation and Fig. 16 a top elevation.

Fig. 17 shows the mechanism when locked, and

Figs. 18 to 20 show details hereinafter referred to. r

The same letters of reference are employed to denote like parts in allthe views.

Referring to Figs. 1 to 7, 1 is the frame of a typewriter, 2 is aplaten-frame, 3 is a platen around which-the sheet is wound. 4: is aratchet-wheel fast with the platen Sand cooperating with a dog 5 to feedthe sheet in the usual way. A plate 6 is arranged to s i g bout t platenaxle and has a Specification of Letters Patent. I I

surface at 9 adapted to cause a detent-roller.

8 to release the platen 3, this effect being obtained by depressing alever 7 arranged on said plate 6. A lever 10' is also rotatable aboutthe platen axle and carries a link piece 11 with guiding face 12, onwhich rests aprojecti'on 13 of the dog 5, so that by adjustment of lever10 themoment when dog 5 engages the ratchet 4 can be controlled and theline-spacing effected. 14 is a guide 'bar' for the carriage-truck, and15 is a bar parallel- Patented Nov..6, 1917. Application filed May23,1916. Serial No. 99,323. r

to the platen 3 and 'hasattached to it a sheet metal guard 16' whichextends downward closely-to the platen 3.

. Theparts so far described are known and not in exactly. the same form.

Now the plate 6 has two pins 16 and 17, the'latter being guided in theslot 18 of a lock plate 19. Lock plate 19 carries a rack 20 adapted toengage or disengage a gear 21 which is fast on the pla'ten axle. Twostop faces 22 and 23, are provided on lock plate 19 and serve to limitthe movement of the latter in both-directions by striking the bar 14:

generally used for typewriting machines if and the hub of gear'21respectively. A link connects the lock plate 19 toa rocking shaft 15which is rotatable within a sleeve 25 held in a bend of the cover 16.This link 24 is loose on shaft 15 and is controlled" by a spring26 whichis wound up on the shaft 15 I i and presses with one end against a'pin27 fixed upon the link 24 and with the other against a second pin'thatis arranged upon a crank 27 fast on the shaft 15. @n this shaft 15 arefurther'fast a lever 28 that may be engaged by the pins 16 and 27, andtwo brackets 29 whose free ends are connected by means of a rod 30. 31is a sheet-metal paper guide curved at its upper end to hold the guard16 where the latter is bent around the sleeve'25, and bent to form agroove 32 resting against guard 16 and into which the rod 30 may enter.v

The sheet a (Fig. 4) to be written upon is passed in between the paperguide 31 and the feeler rod 80, so that the sheet covers groove 32-andby its inherent stifi'nessprevents the feeler 30 from entering saidgroove. Therefore, as long as the sheet covers this groove 32, thespring 26 keeps the pin 27 of link 2 1 pressed against the lever 28,whereby the link 24 is held in a somewhat raised position and thelockplate 19 pressed against thehub of gear 21. In this position t ck 20isout of mesh with th r spring tends to turn gear 36. is adjustablymounted in a slot 46 of said gear'21, so that the platen 3 may rotateand the paper continue to be fed without actuating the lock plate 19. Assoon, however, as the bottom edge of the sheet a passes under the feeler30 and uncovers the groove 32, the feeler 30 trips, enters said grooveand thereby turns shaft 15 in the direction of the pointer 33 in Fig. 1.Accordingly, lever 28 is lowered to rest against pin 16 and, at the sametime, link 21 is rotated in the direction of pointer 33 under theinfluence of pin 27, and the lock plate 19 travels as indicated bypointer 31 in Fig. 1, so that rack 20 engages the gear 21. Then as theplaten 3 continues to rotate, the lock plate 19 proceeds on its way inthe direction of the pointer, and as shaft 15 is looked through lever 28being arrested by the pin 16, the spring 26 is strained. Next, the lockplate 19 strikes with its face 22 against bar 11 (Fig. 6) and the platenis locked,

thus indicating to the operator that a fresh sheet should now becommenced. The length of rack 20 and the size of gear 21 on the one handand the distance between groove 32 and platen 3 on the other hand are sochosen that after rack 20 has engaged gear 21, the sheet willcontinue totravel for a distance permitting to obtain, at the moment when theplaten 3 is locked, the desired width of margin between the last lineand the bottom edge of the sheet. Now lever 7 is pulled asshown bypointer 35 in Fig. 6, so that pin 17 raises the lock plate 19 andthereby disengages rack 20 from gear 21.

Simultaneously, pin 16 lifts lever 28, so

that shaft 15 is rocked and the lock plate 19 returns to the positionshown in Fig. 7 under pressure of spring 26. The sheet a can now beremoved from the typewriter and a new sheet inserted, and after thelever 7 has been pushed back to its normal position, the lock plateoccupies again its initial position as in Fig. 1 and the feeler 30 liesupon the new sheet.

Referring now to Figs. 8 and 9, the mechanism there illustratedcomprises a gear'36 to take the place of the rack 20 in the firstembodiment of the invention. This gear 36 can be made to engage ordisengage the gear 21 and is mounted on a pin 39 which is fixed on alock plate 37. The lock plate 3'? has a slot 38 to engage the hub ofgear 21. The gear 36 is under the action of a spring 40 which is woundupon the pin 39 and rests at one end against a pin 13 of an arm 12 whichis fast on the pin 39, while its other end engages a pm ll fast on thegear 36.

Pointer 44: shows the direction in which the A stop lock plate 37 andagainst the lever 4-7 respectively. Under action of' this spring 18, onearm 47 of the bell crank lever 17 is pressed against pin 19 and may beengaged by a pin 50 mounted on the face of gear 36.

In the path of the other arm of lever 47 is bar 1 1, so, that themovement of this lever 47 is limited by pin 49 on the one and by bar 14on the other side.

A two-armed lever 52 is pivoted at to .cause the gear 36 to rotate inthe direction shown by pointer 1a and thereby to strain spring 40, untilthe stop 45 strikes thearm a7 on the side where it rests a ainst ain 49so that lever 17 is turned against the action of its spring 48. Thenlever 17 is arrested by the bar 14: and prevents further rotation of thegear 36 and therefore also of the platen. In order to release the platenfor removing the sheet from the machine, the plate 6 is turned by meansof the lever 7 as indicated by pointer 3f. This causes a rockingmovement of the lever 52and lock plate 37 is made to travel in thedirection indicated by pointer 51;. this results in disengaging the gear36 from gear 21, whereupon the former, under action of its spring 40rotates, as indicated by pointer 44, and

returns to its startin aosition Fi 9 Now, by. turning the platen, thesheet may be removed from the machine and lover 7 pushed back into itsinitial position.

By adjusting the stop 15 in the slot -16,

the moment when the locking of the platen takes place may be delayed oradvanced so that the margln remaining at the bottom of the page afterthe platen has been locked,

may be obtained of any desired width, that is to say, the device may beadjusted for sheets of different length to obtain any desired width ofmargin.

Referring now more particularly to Figs. 10 and 11, the third example ofcarrying the invention into effect comprises, as in the first exampleshown in Figs. 1 t0 7, a paper feeler 30 adapted to enter a groove 32 ina paper guide 31 and connected to a rocking shaft 15 by means ofbrackets 29. Loose upon this shaft 15 is .a lever 55 connected to theplate 6 by means of a link 56.

Rigidly connected to this lever 55 is a second lever 57 linked to a lockplate 59 which carries a toothed wheel segment 58. Fast upon shaft 15 abell crank lever having arms 60 and 61. A tension spring plate 6 62 isattached with one endto arm 60 and with the other to the lock plate 59,which I the gear 21. As, however, the bottom edge of the sheet leavesthegroove 32 behind and allows the feeler 30 to trip, bell crank lever 60,61 will be slightly depressed and its pin will sink until arrested bythe projection 61. This movement of the lock plate 59 causes the'segment58' to engage gear 21 and as the platen 3 continues to rotate, said lockplate is moved toward bar 14, until it is arrested by its projectionengaging a notch 66 of the bar 14, whereby the platen 3 is looked, asshown by the full lines in Fig. 11. In order to remove the sheet andreturn the mechanism to its starting position, the plate 6 is rotated asshown bypointer 35 and the link 56 causes lever 57 to swing outward, sothat segment 58 is disengaged from the gear 21. While the lock plate 59has been moved'downward, the spring 62 has been strained and now forcesthe lock plate to swing upward until it strikes the pin 63, asshownbythedotand-dash lines in Fig. 11. Now a new sheet may be inserted intothe machine and'then returned to its initial position, so that feelerbar 30 now rests on the surface of the new work sheet and the lock plate59 returns to its initial position as shown in Fig. 10.

Referring now to Figs. 12 and 13, the

example of execution there shown comprises a toothed wheel segment 67forming part of a lock plate 68 and normally engaging the gear 21. Lockplate 68 is journaled to one arm 69 of a threearmed lever that isloosely mounted on a bar 72, the latter being rigidly connected with theplatenframe. The second arm 70 of the threearmed lever carries a nut 73, in which a set screw may be adjusted to limit the upward movement ofthe lock plate 68. At its free end, this arm 70 is formed into'a pointerarranged to workalong a graduation 74 on the segment 67. The third. arm71 of said'three-armed lever is connected to the plate '6 by a'link 76and to the lock plate 68 by a tension spring 77.

As in operating the machine the platen 3 rotates, the lock plate 68 iscaused to move toward the bar 14:, while the pivot of this movement isfixed'in its position through the said three-armed lever being lockedbymeans of thelink 76 and the plate 6. This movement of lock plate 68strains the spring 77 and continues until a. projection 78 of the saidlock plate enters a notch 66 in the bar 14, whereby the platen islocked. In the same way as before described, the

platen is released by turning lever 7 in the direction shown by pointer35, the lock plate 68 being arrested by striking the set screw 7 5. Byadjusting the screw 75 in its nut 73, the movement of the lock plate 68may be controlled and indicated by means of the pointer on thegraduation 74.:

Fig-{1 1 shows that instead of the lock plate 68 being arrested byengaging the rod 14 ofthe machine, a stop 79 may be adjusted upon thesegment 67 by means of" a screw 80 so as to cover a variable number ofteeth. This step projects beyond the Where the mechanism comprises afeeler bar as described, it is also possible to obtain an adjustment ofthe momentof locking the platen, to which purpose the stop face 22 orthe projection 65 may be adjustably arranged.

Referring now more particularly to Figs.

15 to 20, the sixth embodiment of the pres ent invention therein shownhas the'advantage, over the mechanisms described, to be simplerin itsdesign and easier to operate and to adjust. In the same manner asalready described, the machine is provided with a paper feeler 30 andgroove 32. Fast on the axle 1 of the platen 3'aI1d-0utside of theplaten-frame2 is arranged-a sleeve 81, upon which are 'rotatably mountedtwo disks 82, 83 connected to each other by bolts 84: and 85. disks82,83 tend tofollow the rotating movement of the platen 3, said disksconstituting members of a friction clutch to connect the platen with arotary member, hereinafter described. The disk 82 has a projection 101,a cam face 86 and a stop 102. The usual detent-rollcr 8 engaging theline-spacing gear, cotiperates with cam face 86 and stop 102. Lyingagainst disk 83 is a plate 88 having an arm 89 which carries a button90. The disk 83 has notches position, the hook 96 is in engagement withbolt 8-1 thereby preventing the disks 82 and 83 as well astheplate-88from following the platen 3 in its rotation which takes place asindicated at 97 (Figp15). As soon, however, as the bottom edge of thesheet clears Under action of a spring 87 the the groove 32, and thefeeler bar 30 drops into it, lowering lever 93 so that hook 96 releasesthe bolt 84. As the platen continues its feeding motion, the spring 87causes the disks 89., 83 and plate 88 which is now locked by thefriction to plate 88 to rotate until arm 89 after accomplishing morethan half a revolution, comes into the path of the bar 14, and as thecarriage truck proceeds, the arm 89 strikes the end face of the said bar1%, so that the carriage truck is locked and the operator thus notifiedthat the margin left at the bottom of the sheet has the desired width.In order to remove the sheet, the button 90 is brought back turning theplate 88 and the disks 82, 83 in a clockwise direction until the roller8 after having been ongaged by cam face 86 strikes the step 102 and thuslocks the disks 82, 83 and the plate 88. Simultaneously with thedescribed rotation of the said disks, the bolt 84 comes into contactwith the lower side of arm 9a and thus causes lever 93 to rise andfeeler bar 30 to be lifted out of groove 82, whereupon a new sheet canbe introduced. When the button 90 is released, the position of the disks82, 83 and of the plate 88 is maintained unchanged with relation to theplaten 3 and only when, at the next sliding movement of the carriagetruck, the projection 101 engages a beveled face 99 of a stop 100, thedisks 82', 88 and the plate 88 are caused to rotate until the hook 96engages bolt 84, whereby the disks are locked and the whole mechanism isreturned to its initial position.

By placing the pawl 92 into one or the other of the notches 91, theposition of plate 88 in relation to the disks 82, 83 may be altered,whereby the moment of locking the carriage truck 2 is advanced ordelayed at will, so that the width of the margin at the bottom of thesheet can be Varied.

In order to enable the operator if necessary to continue to write a fewwords after the carriage truck has been arrested, one or more notches 98may be provided in the guide bar 14:. Thus, when the arm 89 has struckthe face 14 of said bai, the operator may, by hand, lift this arm 89 toclear said face and the writing may continue, but only 'until theengagement of arm 89 in the next notch 98 again locks the machine.

This last embodiment of the present in vention is of a particularlysimple design and easily manipulated and its attachment to a typewriting machine does not render the latter either much more expensive ormore cumbersome than any machine without an attachment.

I claim:

1. In a type-writing machine, the combination with a platen, a detentand a detent release mechanism; of mechanism for determining the bottommargin of the sheet, re-

reeaeee set to operative position by said detent release mechanism.

2. In a type-writing machine, the combination with a platen, a detentand a detent release mechanism; of mechanism for locking the platen todetermine a margin at the bottom of the sheet and re-set to operativeposition by the detent release mechanism when it is re-set to itsnon-release posit-ion.

8. In a type-writing machine the combination with a platen, a detent anda detent release mechanism; of mechanism for determining the bottommargin of a sheet, and means included in both mechanisms whereby themargin determining mechanism is automatically reset to operativeposition by the movement of the detent release mechanism to itsnon-release position.

4:. In a type-writing machine, the combination with a platen, a detentand a detent release mechanism including a rotatable member; ofmechanism for determining the bottom margin of sheet cooperating withsaid platen, means to connect said member and the margin determiningmechanism, said member operating to re-set the latter mechanism andreturn the detent release mechanism for normal operation of the platen.

5. In a type-writing machine, the combination with a platen, a detentand a detent release mechanism; of mechanism for determining the bottomof a sheet, reset by the detent release mechanism, and means toadjustably connect the two mechanisms together to vary the bottommargin.

6. In a type-writing machine, the combination with a rotatable platen, adetent and a detent release mechanism including a rotatable actuatingmember; of sheet-controlled bottom margin determining mechanismcooperating with said platen, and a pawl to adjus'tably connect saidmember and the margin determining mechanism, said member operating toreset the margin determining mechanism and simultaneously to return thedetent release mechanism for normal operation of the platen.

7. In a type-writing machine, the combination with a rotatable platen, adetent and a detent release mechanism including a rotatable member; of abottom margin determining mechanism comprising a clutch arranged toconnect said member and platen, and controlled lever mechanism tonormally hold the clutch stationary and permit said member to remainstationary while typing the bodyof the sheet.

8. In a type-writing machine, the combination with a rotatable platen, adetent and a detent release mechanism including a rotatable member; of abottom margin determining mechanism comprising a clutch arranged toconnect said member and platen, controlled lever mechanism to normallyhold the clutch stationary and perm t said m mher to remain stationaryWhile typing the body of the sheet, and means to adjustably positionsaid member about the platen axis to vary the bottom margin. 7

9. In a type-writing machine,the combination With a rotatable platen,.adetent and a detent release mechanism including a rotatable member; ofsheet controlled bottom margin determining mechanism including a forkedlever one of whose fork arms is provided with a hook, a clutch on theplaten shaft including a bolt engaged by said hook to hold the clutchinoperative until the margin determining mechanism is actuated, andthereafter said clutch connects said memher and platen.

10. In a type-Writing machine, the combination with a rotatable platen,a detent and a detentrelease mechanism including a rotatable member onthe platen shaft; of a sheet controlled bottom margin determiningmechanism including a forked lever one of whose fork arms isprovidedwith a hook, a friction clutch on the platen shaft including twoangularly displaced bolts one of which is engaged by said hook to holdthe clutch inoperative until the margin determining mechanism isactuated, and the other of which acts as a positive stop to the rotationof the clutch.

11. In a type-Writing machine, the combination with a platen, of afeeler bar, a groove to receive it, brackets, a shaft, a lever fast onsaid shaft, a clutch yieldingly connected to said platen, two arms onsaid lever, a hook on one of said arms, two bolts in said clutch, aplate adjustably connected to said platen.

12. In a type-Writing machine, the combination with a platen, of a sheetcontrolled lever, tWo arms on this lever, a hook on one arm, a clutch,two bolts in said clutch to engage said arms, a plate adiustablyconnected to said clutch, an arm on said plate, means for engaging saidarm, a cam face and stop on said plate and of means for returning saidplate into its initial position.

18. In a type-writing machine, the combination with a platen, of a sheetcontrolled lever, an arm on this lever, a hook on said arm, a clutchspring connected to said platen, a bolt in said clutch, means forarresting said platen attached to said clutch, means for unlocking saidplaten provided on said plate, a projection on said plate, and of abeveled stop to engage said projection.

14. In a type-Writing machine, the combination with a platen, a guidebar for the platen carriage, a detent and a detent release mechanism; ofmechanism for determining the bottom margin of the sheet limited in itsoperation by the guide bar.

In testimony that I claim the foregoing as 'my invention, I have signedmy name in presence of two subscribing Witnesses.

, VICTOR KOBLER-STAUDER. Witnesses:

CARL GUBLER, ARNOLD LEHNERT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

